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The distance between two successive crests of a wave is 15 cm and the velocity is 300ms¯¹. Calculate the frequency.

A. 4.5 × 10⁵ Hz

B. 4.5 × 10² Hz

C. 2.0 × 10³ Hz

D. 2.0 × 10² Hz

QUICK ANSWER…

C

DETAILS…

The distance between two successive crests of a wave is actually its wavelength.

So, wavelength = 15cm = 15/100m = 0.15m

Velocity = 300ms¯¹

Now,

Now for the right answer to the above question:

1. Option A is incorrect.
2. Option B is incorrect.
3. C is correct.
4. D is not the correct answer. the number of zeros are three.

KEY-POINTS…

You may please note these/this:

• Remember to convert the wavelength from cm to m, as the velocity is given in m/s.
• The distance between two successive crests of a wave is = 1 wavelength.
• The distance between two successive troughs of a wave is also = 1 wavelength.

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/ culled from 2015 JAMB-UTME physics past question 38 /